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-rw-r--r--sftp-client.c1958
1 files changed, 1958 insertions, 0 deletions
diff --git a/sftp-client.c b/sftp-client.c
new file mode 100644
index 0000000..b8e131b
--- /dev/null
+++ b/sftp-client.c
@@ -0,0 +1,1958 @@
+/* $OpenBSD: sftp-client.c,v 1.136 2020/05/15 03:57:33 djm Exp $ */
+/*
+ * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* XXX: memleaks */
+/* XXX: signed vs unsigned */
+/* XXX: remove all logging, only return status codes */
+/* XXX: copy between two remote sites */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#ifdef HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
+#include "openbsd-compat/sys-queue.h"
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/uio.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "xmalloc.h"
+#include "ssherr.h"
+#include "sshbuf.h"
+#include "log.h"
+#include "atomicio.h"
+#include "progressmeter.h"
+#include "misc.h"
+#include "utf8.h"
+
+#include "sftp.h"
+#include "sftp-common.h"
+#include "sftp-client.h"
+
+extern volatile sig_atomic_t interrupted;
+extern int showprogress;
+
+/* Minimum amount of data to read at a time */
+#define MIN_READ_SIZE 512
+
+/* Maximum depth to descend in directory trees */
+#define MAX_DIR_DEPTH 64
+
+/* Directory separator characters */
+#ifdef HAVE_CYGWIN
+# define SFTP_DIRECTORY_CHARS "/\\"
+#else /* HAVE_CYGWIN */
+# define SFTP_DIRECTORY_CHARS "/"
+#endif /* HAVE_CYGWIN */
+
+struct sftp_conn {
+ int fd_in;
+ int fd_out;
+ u_int transfer_buflen;
+ u_int num_requests;
+ u_int version;
+ u_int msg_id;
+#define SFTP_EXT_POSIX_RENAME 0x00000001
+#define SFTP_EXT_STATVFS 0x00000002
+#define SFTP_EXT_FSTATVFS 0x00000004
+#define SFTP_EXT_HARDLINK 0x00000008
+#define SFTP_EXT_FSYNC 0x00000010
+#define SFTP_EXT_LSETSTAT 0x00000020
+ u_int exts;
+ u_int64_t limit_kbps;
+ struct bwlimit bwlimit_in, bwlimit_out;
+};
+
+static u_char *
+get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
+ const char *errfmt, ...) __attribute__((format(printf, 4, 5)));
+
+/* ARGSUSED */
+static int
+sftpio(void *_bwlimit, size_t amount)
+{
+ struct bwlimit *bwlimit = (struct bwlimit *)_bwlimit;
+
+ refresh_progress_meter(0);
+ if (bwlimit != NULL)
+ bandwidth_limit(bwlimit, amount);
+ return 0;
+}
+
+static void
+send_msg(struct sftp_conn *conn, struct sshbuf *m)
+{
+ u_char mlen[4];
+ struct iovec iov[2];
+
+ if (sshbuf_len(m) > SFTP_MAX_MSG_LENGTH)
+ fatal("Outbound message too long %zu", sshbuf_len(m));
+
+ /* Send length first */
+ put_u32(mlen, sshbuf_len(m));
+ iov[0].iov_base = mlen;
+ iov[0].iov_len = sizeof(mlen);
+ iov[1].iov_base = (u_char *)sshbuf_ptr(m);
+ iov[1].iov_len = sshbuf_len(m);
+
+ if (atomiciov6(writev, conn->fd_out, iov, 2, sftpio,
+ conn->limit_kbps > 0 ? &conn->bwlimit_out : NULL) !=
+ sshbuf_len(m) + sizeof(mlen))
+ fatal("Couldn't send packet: %s", strerror(errno));
+
+ sshbuf_reset(m);
+}
+
+static void
+get_msg_extended(struct sftp_conn *conn, struct sshbuf *m, int initial)
+{
+ u_int msg_len;
+ u_char *p;
+ int r;
+
+ if ((r = sshbuf_reserve(m, 4, &p)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (atomicio6(read, conn->fd_in, p, 4, sftpio,
+ conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL) != 4) {
+ if (errno == EPIPE || errno == ECONNRESET)
+ fatal("Connection closed");
+ else
+ fatal("Couldn't read packet: %s", strerror(errno));
+ }
+
+ if ((r = sshbuf_get_u32(m, &msg_len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (msg_len > SFTP_MAX_MSG_LENGTH) {
+ do_log2(initial ? SYSLOG_LEVEL_ERROR : SYSLOG_LEVEL_FATAL,
+ "Received message too long %u", msg_len);
+ fatal("Ensure the remote shell produces no output "
+ "for non-interactive sessions.");
+ }
+
+ if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (atomicio6(read, conn->fd_in, p, msg_len, sftpio,
+ conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL)
+ != msg_len) {
+ if (errno == EPIPE)
+ fatal("Connection closed");
+ else
+ fatal("Read packet: %s", strerror(errno));
+ }
+}
+
+static void
+get_msg(struct sftp_conn *conn, struct sshbuf *m)
+{
+ get_msg_extended(conn, m, 0);
+}
+
+static void
+send_string_request(struct sftp_conn *conn, u_int id, u_int code, const char *s,
+ u_int len)
+{
+ struct sshbuf *msg;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, code)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_string(msg, s, len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id);
+ sshbuf_free(msg);
+}
+
+static void
+send_string_attrs_request(struct sftp_conn *conn, u_int id, u_int code,
+ const void *s, u_int len, Attrib *a)
+{
+ struct sshbuf *msg;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, code)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_string(msg, s, len)) != 0 ||
+ (r = encode_attrib(msg, a)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id);
+ sshbuf_free(msg);
+}
+
+static u_int
+get_status(struct sftp_conn *conn, u_int expected_id)
+{
+ struct sshbuf *msg;
+ u_char type;
+ u_int id, status;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+ if (type != SSH2_FXP_STATUS)
+ fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
+ SSH2_FXP_STATUS, type);
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ sshbuf_free(msg);
+
+ debug3("SSH2_FXP_STATUS %u", status);
+
+ return status;
+}
+
+static u_char *
+get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
+ const char *errfmt, ...)
+{
+ struct sshbuf *msg;
+ u_int id, status;
+ u_char type;
+ u_char *handle;
+ char errmsg[256];
+ va_list args;
+ int r;
+
+ va_start(args, errfmt);
+ if (errfmt != NULL)
+ vsnprintf(errmsg, sizeof(errmsg), errfmt, args);
+ va_end(args);
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ if (id != expected_id)
+ fatal("%s: ID mismatch (%u != %u)",
+ errfmt == NULL ? __func__ : errmsg, id, expected_id);
+ if (type == SSH2_FXP_STATUS) {
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (errfmt != NULL)
+ error("%s: %s", errmsg, fx2txt(status));
+ sshbuf_free(msg);
+ return(NULL);
+ } else if (type != SSH2_FXP_HANDLE)
+ fatal("%s: Expected SSH2_FXP_HANDLE(%u) packet, got %u",
+ errfmt == NULL ? __func__ : errmsg, SSH2_FXP_HANDLE, type);
+
+ if ((r = sshbuf_get_string(msg, &handle, len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ sshbuf_free(msg);
+
+ return handle;
+}
+
+static Attrib *
+get_decode_stat(struct sftp_conn *conn, u_int expected_id, int quiet)
+{
+ struct sshbuf *msg;
+ u_int id;
+ u_char type;
+ int r;
+ static Attrib a;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ get_msg(conn, msg);
+
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug3("Received stat reply T:%u I:%u", type, id);
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+ if (type == SSH2_FXP_STATUS) {
+ u_int status;
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (quiet)
+ debug("Couldn't stat remote file: %s", fx2txt(status));
+ else
+ error("Couldn't stat remote file: %s", fx2txt(status));
+ sshbuf_free(msg);
+ return(NULL);
+ } else if (type != SSH2_FXP_ATTRS) {
+ fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
+ SSH2_FXP_ATTRS, type);
+ }
+ if ((r = decode_attrib(msg, &a)) != 0) {
+ error("%s: couldn't decode attrib: %s", __func__, ssh_err(r));
+ sshbuf_free(msg);
+ return NULL;
+ }
+ sshbuf_free(msg);
+
+ return &a;
+}
+
+static int
+get_decode_statvfs(struct sftp_conn *conn, struct sftp_statvfs *st,
+ u_int expected_id, int quiet)
+{
+ struct sshbuf *msg;
+ u_char type;
+ u_int id;
+ u_int64_t flag;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ get_msg(conn, msg);
+
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug3("Received statvfs reply T:%u I:%u", type, id);
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+ if (type == SSH2_FXP_STATUS) {
+ u_int status;
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (quiet)
+ debug("Couldn't statvfs: %s", fx2txt(status));
+ else
+ error("Couldn't statvfs: %s", fx2txt(status));
+ sshbuf_free(msg);
+ return -1;
+ } else if (type != SSH2_FXP_EXTENDED_REPLY) {
+ fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u",
+ SSH2_FXP_EXTENDED_REPLY, type);
+ }
+
+ memset(st, 0, sizeof(*st));
+ if ((r = sshbuf_get_u64(msg, &st->f_bsize)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_frsize)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_blocks)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_bfree)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_bavail)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_files)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_ffree)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_favail)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_fsid)) != 0 ||
+ (r = sshbuf_get_u64(msg, &flag)) != 0 ||
+ (r = sshbuf_get_u64(msg, &st->f_namemax)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ st->f_flag = (flag & SSH2_FXE_STATVFS_ST_RDONLY) ? ST_RDONLY : 0;
+ st->f_flag |= (flag & SSH2_FXE_STATVFS_ST_NOSUID) ? ST_NOSUID : 0;
+
+ sshbuf_free(msg);
+
+ return 0;
+}
+
+struct sftp_conn *
+do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests,
+ u_int64_t limit_kbps)
+{
+ u_char type;
+ struct sshbuf *msg;
+ struct sftp_conn *ret;
+ int r;
+
+ ret = xcalloc(1, sizeof(*ret));
+ ret->msg_id = 1;
+ ret->fd_in = fd_in;
+ ret->fd_out = fd_out;
+ ret->transfer_buflen = transfer_buflen;
+ ret->num_requests = num_requests;
+ ret->exts = 0;
+ ret->limit_kbps = 0;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_INIT)) != 0 ||
+ (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(ret, msg);
+
+ sshbuf_reset(msg);
+
+ get_msg_extended(ret, msg, 1);
+
+ /* Expecting a VERSION reply */
+ if ((r = sshbuf_get_u8(msg, &type)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (type != SSH2_FXP_VERSION) {
+ error("Invalid packet back from SSH2_FXP_INIT (type %u)",
+ type);
+ sshbuf_free(msg);
+ free(ret);
+ return(NULL);
+ }
+ if ((r = sshbuf_get_u32(msg, &ret->version)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug2("Remote version: %u", ret->version);
+
+ /* Check for extensions */
+ while (sshbuf_len(msg) > 0) {
+ char *name;
+ u_char *value;
+ size_t vlen;
+ int known = 0;
+
+ if ((r = sshbuf_get_cstring(msg, &name, NULL)) != 0 ||
+ (r = sshbuf_get_string(msg, &value, &vlen)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (strcmp(name, "posix-rename@openssh.com") == 0 &&
+ strcmp((char *)value, "1") == 0) {
+ ret->exts |= SFTP_EXT_POSIX_RENAME;
+ known = 1;
+ } else if (strcmp(name, "statvfs@openssh.com") == 0 &&
+ strcmp((char *)value, "2") == 0) {
+ ret->exts |= SFTP_EXT_STATVFS;
+ known = 1;
+ } else if (strcmp(name, "fstatvfs@openssh.com") == 0 &&
+ strcmp((char *)value, "2") == 0) {
+ ret->exts |= SFTP_EXT_FSTATVFS;
+ known = 1;
+ } else if (strcmp(name, "hardlink@openssh.com") == 0 &&
+ strcmp((char *)value, "1") == 0) {
+ ret->exts |= SFTP_EXT_HARDLINK;
+ known = 1;
+ } else if (strcmp(name, "fsync@openssh.com") == 0 &&
+ strcmp((char *)value, "1") == 0) {
+ ret->exts |= SFTP_EXT_FSYNC;
+ known = 1;
+ } else if (strcmp(name, "lsetstat@openssh.com") == 0 &&
+ strcmp((char *)value, "1") == 0) {
+ ret->exts |= SFTP_EXT_LSETSTAT;
+ known = 1;
+ }
+ if (known) {
+ debug2("Server supports extension \"%s\" revision %s",
+ name, value);
+ } else {
+ debug2("Unrecognised server extension \"%s\"", name);
+ }
+ free(name);
+ free(value);
+ }
+
+ sshbuf_free(msg);
+
+ /* Some filexfer v.0 servers don't support large packets */
+ if (ret->version == 0)
+ ret->transfer_buflen = MINIMUM(ret->transfer_buflen, 20480);
+
+ ret->limit_kbps = limit_kbps;
+ if (ret->limit_kbps > 0) {
+ bandwidth_limit_init(&ret->bwlimit_in, ret->limit_kbps,
+ ret->transfer_buflen);
+ bandwidth_limit_init(&ret->bwlimit_out, ret->limit_kbps,
+ ret->transfer_buflen);
+ }
+
+ return ret;
+}
+
+u_int
+sftp_proto_version(struct sftp_conn *conn)
+{
+ return conn->version;
+}
+
+int
+do_close(struct sftp_conn *conn, const u_char *handle, u_int handle_len)
+{
+ u_int id, status;
+ struct sshbuf *msg;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_CLOSE)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't close file: %s", fx2txt(status));
+
+ sshbuf_free(msg);
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+
+static int
+do_lsreaddir(struct sftp_conn *conn, const char *path, int print_flag,
+ SFTP_DIRENT ***dir)
+{
+ struct sshbuf *msg;
+ u_int count, id, i, expected_id, ents = 0;
+ size_t handle_len;
+ u_char type, *handle;
+ int status = SSH2_FX_FAILURE;
+ int r;
+
+ if (dir)
+ *dir = NULL;
+
+ id = conn->msg_id++;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPENDIR)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, path)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+
+ handle = get_handle(conn, id, &handle_len,
+ "remote readdir(\"%s\")", path);
+ if (handle == NULL) {
+ sshbuf_free(msg);
+ return -1;
+ }
+
+ if (dir) {
+ ents = 0;
+ *dir = xcalloc(1, sizeof(**dir));
+ (*dir)[0] = NULL;
+ }
+
+ for (; !interrupted;) {
+ id = expected_id = conn->msg_id++;
+
+ debug3("Sending SSH2_FXP_READDIR I:%u", id);
+
+ sshbuf_reset(msg);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_READDIR)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+
+ sshbuf_reset(msg);
+
+ get_msg(conn, msg);
+
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug3("Received reply T:%u I:%u", type, id);
+
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+
+ if (type == SSH2_FXP_STATUS) {
+ u_int rstatus;
+
+ if ((r = sshbuf_get_u32(msg, &rstatus)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ debug3("Received SSH2_FXP_STATUS %d", rstatus);
+ if (rstatus == SSH2_FX_EOF)
+ break;
+ error("Couldn't read directory: %s", fx2txt(rstatus));
+ goto out;
+ } else if (type != SSH2_FXP_NAME)
+ fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
+ SSH2_FXP_NAME, type);
+
+ if ((r = sshbuf_get_u32(msg, &count)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (count > SSHBUF_SIZE_MAX)
+ fatal("%s: nonsensical number of entries", __func__);
+ if (count == 0)
+ break;
+ debug3("Received %d SSH2_FXP_NAME responses", count);
+ for (i = 0; i < count; i++) {
+ char *filename, *longname;
+ Attrib a;
+
+ if ((r = sshbuf_get_cstring(msg, &filename,
+ NULL)) != 0 ||
+ (r = sshbuf_get_cstring(msg, &longname,
+ NULL)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ if ((r = decode_attrib(msg, &a)) != 0) {
+ error("%s: couldn't decode attrib: %s",
+ __func__, ssh_err(r));
+ free(filename);
+ free(longname);
+ goto out;
+ }
+
+ if (print_flag)
+ mprintf("%s\n", longname);
+
+ /*
+ * Directory entries should never contain '/'
+ * These can be used to attack recursive ops
+ * (e.g. send '../../../../etc/passwd')
+ */
+ if (strpbrk(filename, SFTP_DIRECTORY_CHARS) != NULL) {
+ error("Server sent suspect path \"%s\" "
+ "during readdir of \"%s\"", filename, path);
+ } else if (dir) {
+ *dir = xreallocarray(*dir, ents + 2, sizeof(**dir));
+ (*dir)[ents] = xcalloc(1, sizeof(***dir));
+ (*dir)[ents]->filename = xstrdup(filename);
+ (*dir)[ents]->longname = xstrdup(longname);
+ memcpy(&(*dir)[ents]->a, &a, sizeof(a));
+ (*dir)[++ents] = NULL;
+ }
+ free(filename);
+ free(longname);
+ }
+ }
+ status = 0;
+
+ out:
+ sshbuf_free(msg);
+ do_close(conn, handle, handle_len);
+ free(handle);
+
+ if (status != 0 && dir != NULL) {
+ /* Don't return results on error */
+ free_sftp_dirents(*dir);
+ *dir = NULL;
+ } else if (interrupted && dir != NULL && *dir != NULL) {
+ /* Don't return partial matches on interrupt */
+ free_sftp_dirents(*dir);
+ *dir = xcalloc(1, sizeof(**dir));
+ **dir = NULL;
+ }
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_readdir(struct sftp_conn *conn, const char *path, SFTP_DIRENT ***dir)
+{
+ return(do_lsreaddir(conn, path, 0, dir));
+}
+
+void free_sftp_dirents(SFTP_DIRENT **s)
+{
+ int i;
+
+ if (s == NULL)
+ return;
+ for (i = 0; s[i]; i++) {
+ free(s[i]->filename);
+ free(s[i]->longname);
+ free(s[i]);
+ }
+ free(s);
+}
+
+int
+do_rm(struct sftp_conn *conn, const char *path)
+{
+ u_int status, id;
+
+ debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
+
+ id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_REMOVE, path, strlen(path));
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't delete file: %s", fx2txt(status));
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_mkdir(struct sftp_conn *conn, const char *path, Attrib *a, int print_flag)
+{
+ u_int status, id;
+
+ id = conn->msg_id++;
+ send_string_attrs_request(conn, id, SSH2_FXP_MKDIR, path,
+ strlen(path), a);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK && print_flag)
+ error("Couldn't create directory: %s", fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_rmdir(struct sftp_conn *conn, const char *path)
+{
+ u_int status, id;
+
+ id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_RMDIR, path,
+ strlen(path));
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't remove directory: %s", fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+Attrib *
+do_stat(struct sftp_conn *conn, const char *path, int quiet)
+{
+ u_int id;
+
+ id = conn->msg_id++;
+
+ send_string_request(conn, id,
+ conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
+ path, strlen(path));
+
+ return(get_decode_stat(conn, id, quiet));
+}
+
+Attrib *
+do_lstat(struct sftp_conn *conn, const char *path, int quiet)
+{
+ u_int id;
+
+ if (conn->version == 0) {
+ if (quiet)
+ debug("Server version does not support lstat operation");
+ else
+ logit("Server version does not support lstat operation");
+ return(do_stat(conn, path, quiet));
+ }
+
+ id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_LSTAT, path,
+ strlen(path));
+
+ return(get_decode_stat(conn, id, quiet));
+}
+
+#ifdef notyet
+Attrib *
+do_fstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
+ int quiet)
+{
+ u_int id;
+
+ id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_FSTAT, handle,
+ handle_len);
+
+ return(get_decode_stat(conn, id, quiet));
+}
+#endif
+
+int
+do_setstat(struct sftp_conn *conn, const char *path, Attrib *a)
+{
+ u_int status, id;
+
+ id = conn->msg_id++;
+ send_string_attrs_request(conn, id, SSH2_FXP_SETSTAT, path,
+ strlen(path), a);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't setstat on \"%s\": %s", path,
+ fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_fsetstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
+ Attrib *a)
+{
+ u_int status, id;
+
+ id = conn->msg_id++;
+ send_string_attrs_request(conn, id, SSH2_FXP_FSETSTAT, handle,
+ handle_len, a);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't fsetstat: %s", fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+char *
+do_realpath(struct sftp_conn *conn, const char *path)
+{
+ struct sshbuf *msg;
+ u_int expected_id, count, id;
+ char *filename, *longname;
+ Attrib a;
+ u_char type;
+ int r;
+
+ expected_id = id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_REALPATH, path,
+ strlen(path));
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+
+ if (type == SSH2_FXP_STATUS) {
+ u_int status;
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ error("Couldn't canonicalize: %s", fx2txt(status));
+ sshbuf_free(msg);
+ return NULL;
+ } else if (type != SSH2_FXP_NAME)
+ fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
+ SSH2_FXP_NAME, type);
+
+ if ((r = sshbuf_get_u32(msg, &count)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (count != 1)
+ fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
+
+ if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
+ (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
+ (r = decode_attrib(msg, &a)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug3("SSH_FXP_REALPATH %s -> %s size %lu", path, filename,
+ (unsigned long)a.size);
+
+ free(longname);
+
+ sshbuf_free(msg);
+
+ return(filename);
+}
+
+int
+do_rename(struct sftp_conn *conn, const char *oldpath, const char *newpath,
+ int force_legacy)
+{
+ struct sshbuf *msg;
+ u_int status, id;
+ int r, use_ext = (conn->exts & SFTP_EXT_POSIX_RENAME) && !force_legacy;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ /* Send rename request */
+ id = conn->msg_id++;
+ if (use_ext) {
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg,
+ "posix-rename@openssh.com")) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ } else {
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_RENAME)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ }
+ if ((r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
+ (r = sshbuf_put_cstring(msg, newpath)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message %s \"%s\" -> \"%s\"",
+ use_ext ? "posix-rename@openssh.com" :
+ "SSH2_FXP_RENAME", oldpath, newpath);
+ sshbuf_free(msg);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
+ newpath, fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_hardlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
+{
+ struct sshbuf *msg;
+ u_int status, id;
+ int r;
+
+ if ((conn->exts & SFTP_EXT_HARDLINK) == 0) {
+ error("Server does not support hardlink@openssh.com extension");
+ return -1;
+ }
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ /* Send link request */
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 ||
+ (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
+ (r = sshbuf_put_cstring(msg, newpath)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"",
+ oldpath, newpath);
+ sshbuf_free(msg);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't link file \"%s\" to \"%s\": %s", oldpath,
+ newpath, fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_symlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
+{
+ struct sshbuf *msg;
+ u_int status, id;
+ int r;
+
+ if (conn->version < 3) {
+ error("This server does not support the symlink operation");
+ return(SSH2_FX_OP_UNSUPPORTED);
+ }
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ /* Send symlink request */
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_SYMLINK)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
+ (r = sshbuf_put_cstring(msg, newpath)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
+ newpath);
+ sshbuf_free(msg);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
+ newpath, fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+int
+do_fsync(struct sftp_conn *conn, u_char *handle, u_int handle_len)
+{
+ struct sshbuf *msg;
+ u_int status, id;
+ int r;
+
+ /* Silently return if the extension is not supported */
+ if ((conn->exts & SFTP_EXT_FSYNC) == 0)
+ return -1;
+
+ /* Send fsync request */
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 ||
+ (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message fsync@openssh.com I:%u", id);
+ sshbuf_free(msg);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't sync file: %s", fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+#ifdef notyet
+char *
+do_readlink(struct sftp_conn *conn, const char *path)
+{
+ struct sshbuf *msg;
+ u_int expected_id, count, id;
+ char *filename, *longname;
+ Attrib a;
+ u_char type;
+ int r;
+
+ expected_id = id = conn->msg_id++;
+ send_string_request(conn, id, SSH2_FXP_READLINK, path, strlen(path));
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ if (id != expected_id)
+ fatal("ID mismatch (%u != %u)", id, expected_id);
+
+ if (type == SSH2_FXP_STATUS) {
+ u_int status;
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ error("Couldn't readlink: %s", fx2txt(status));
+ sshbuf_free(msg);
+ return(NULL);
+ } else if (type != SSH2_FXP_NAME)
+ fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
+ SSH2_FXP_NAME, type);
+
+ if ((r = sshbuf_get_u32(msg, &count)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ if (count != 1)
+ fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
+
+ if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
+ (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
+ (r = decode_attrib(msg, &a)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+
+ debug3("SSH_FXP_READLINK %s -> %s", path, filename);
+
+ free(longname);
+
+ sshbuf_free(msg);
+
+ return filename;
+}
+#endif
+
+int
+do_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st,
+ int quiet)
+{
+ struct sshbuf *msg;
+ u_int id;
+ int r;
+
+ if ((conn->exts & SFTP_EXT_STATVFS) == 0) {
+ error("Server does not support statvfs@openssh.com extension");
+ return -1;
+ }
+
+ id = conn->msg_id++;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 ||
+ (r = sshbuf_put_cstring(msg, path)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ sshbuf_free(msg);
+
+ return get_decode_statvfs(conn, st, id, quiet);
+}
+
+#ifdef notyet
+int
+do_fstatvfs(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
+ struct sftp_statvfs *st, int quiet)
+{
+ struct sshbuf *msg;
+ u_int id;
+
+ if ((conn->exts & SFTP_EXT_FSTATVFS) == 0) {
+ error("Server does not support fstatvfs@openssh.com extension");
+ return -1;
+ }
+
+ id = conn->msg_id++;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 ||
+ (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ sshbuf_free(msg);
+
+ return get_decode_statvfs(conn, st, id, quiet);
+}
+#endif
+
+int
+do_lsetstat(struct sftp_conn *conn, const char *path, Attrib *a)
+{
+ struct sshbuf *msg;
+ u_int status, id;
+ int r;
+
+ if ((conn->exts & SFTP_EXT_LSETSTAT) == 0) {
+ error("Server does not support lsetstat@openssh.com extension");
+ return -1;
+ }
+
+ id = conn->msg_id++;
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, "lsetstat@openssh.com")) != 0 ||
+ (r = sshbuf_put_cstring(msg, path)) != 0 ||
+ (r = encode_attrib(msg, a)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ sshbuf_free(msg);
+
+ status = get_status(conn, id);
+ if (status != SSH2_FX_OK)
+ error("Couldn't setstat on \"%s\": %s", path,
+ fx2txt(status));
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+static void
+send_read_request(struct sftp_conn *conn, u_int id, u_int64_t offset,
+ u_int len, const u_char *handle, u_int handle_len)
+{
+ struct sshbuf *msg;
+ int r;
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_READ)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_string(msg, handle, handle_len)) != 0 ||
+ (r = sshbuf_put_u64(msg, offset)) != 0 ||
+ (r = sshbuf_put_u32(msg, len)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ sshbuf_free(msg);
+}
+
+int
+do_download(struct sftp_conn *conn, const char *remote_path,
+ const char *local_path, Attrib *a, int preserve_flag, int resume_flag,
+ int fsync_flag)
+{
+ Attrib junk;
+ struct sshbuf *msg;
+ u_char *handle;
+ int local_fd = -1, write_error;
+ int read_error, write_errno, lmodified = 0, reordered = 0, r;
+ u_int64_t offset = 0, size, highwater;
+ u_int mode, id, buflen, num_req, max_req, status = SSH2_FX_OK;
+ off_t progress_counter;
+ size_t handle_len;
+ struct stat st;
+ struct request {
+ u_int id;
+ size_t len;
+ u_int64_t offset;
+ TAILQ_ENTRY(request) tq;
+ };
+ TAILQ_HEAD(reqhead, request) requests;
+ struct request *req;
+ u_char type;
+
+ TAILQ_INIT(&requests);
+
+ if (a == NULL && (a = do_stat(conn, remote_path, 0)) == NULL)
+ return -1;
+
+ /* Do not preserve set[ug]id here, as we do not preserve ownership */
+ if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
+ mode = a->perm & 0777;
+ else
+ mode = 0666;
+
+ if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
+ (!S_ISREG(a->perm))) {
+ error("Cannot download non-regular file: %s", remote_path);
+ return(-1);
+ }
+
+ if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
+ size = a->size;
+ else
+ size = 0;
+
+ buflen = conn->transfer_buflen;
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ attrib_clear(&junk); /* Send empty attributes */
+
+ /* Send open request */
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, remote_path)) != 0 ||
+ (r = sshbuf_put_u32(msg, SSH2_FXF_READ)) != 0 ||
+ (r = encode_attrib(msg, &junk)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
+
+ handle = get_handle(conn, id, &handle_len,
+ "remote open(\"%s\")", remote_path);
+ if (handle == NULL) {
+ sshbuf_free(msg);
+ return(-1);
+ }
+
+ local_fd = open(local_path,
+ O_WRONLY | O_CREAT | (resume_flag ? 0 : O_TRUNC), mode | S_IWUSR);
+ if (local_fd == -1) {
+ error("Couldn't open local file \"%s\" for writing: %s",
+ local_path, strerror(errno));
+ goto fail;
+ }
+ offset = highwater = 0;
+ if (resume_flag) {
+ if (fstat(local_fd, &st) == -1) {
+ error("Unable to stat local file \"%s\": %s",
+ local_path, strerror(errno));
+ goto fail;
+ }
+ if (st.st_size < 0) {
+ error("\"%s\" has negative size", local_path);
+ goto fail;
+ }
+ if ((u_int64_t)st.st_size > size) {
+ error("Unable to resume download of \"%s\": "
+ "local file is larger than remote", local_path);
+ fail:
+ do_close(conn, handle, handle_len);
+ sshbuf_free(msg);
+ free(handle);
+ if (local_fd != -1)
+ close(local_fd);
+ return -1;
+ }
+ offset = highwater = st.st_size;
+ }
+
+ /* Read from remote and write to local */
+ write_error = read_error = write_errno = num_req = 0;
+ max_req = 1;
+ progress_counter = offset;
+
+ if (showprogress && size != 0)
+ start_progress_meter(remote_path, size, &progress_counter);
+
+ while (num_req > 0 || max_req > 0) {
+ u_char *data;
+ size_t len;
+
+ /*
+ * Simulate EOF on interrupt: stop sending new requests and
+ * allow outstanding requests to drain gracefully
+ */
+ if (interrupted) {
+ if (num_req == 0) /* If we haven't started yet... */
+ break;
+ max_req = 0;
+ }
+
+ /* Send some more requests */
+ while (num_req < max_req) {
+ debug3("Request range %llu -> %llu (%d/%d)",
+ (unsigned long long)offset,
+ (unsigned long long)offset + buflen - 1,
+ num_req, max_req);
+ req = xcalloc(1, sizeof(*req));
+ req->id = conn->msg_id++;
+ req->len = buflen;
+ req->offset = offset;
+ offset += buflen;
+ num_req++;
+ TAILQ_INSERT_TAIL(&requests, req, tq);
+ send_read_request(conn, req->id, req->offset,
+ req->len, handle, handle_len);
+ }
+
+ sshbuf_reset(msg);
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &id)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
+
+ /* Find the request in our queue */
+ for (req = TAILQ_FIRST(&requests);
+ req != NULL && req->id != id;
+ req = TAILQ_NEXT(req, tq))
+ ;
+ if (req == NULL)
+ fatal("Unexpected reply %u", id);
+
+ switch (type) {
+ case SSH2_FXP_STATUS:
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ if (status != SSH2_FX_EOF)
+ read_error = 1;
+ max_req = 0;
+ TAILQ_REMOVE(&requests, req, tq);
+ free(req);
+ num_req--;
+ break;
+ case SSH2_FXP_DATA:
+ if ((r = sshbuf_get_string(msg, &data, &len)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ debug3("Received data %llu -> %llu",
+ (unsigned long long)req->offset,
+ (unsigned long long)req->offset + len - 1);
+ if (len > req->len)
+ fatal("Received more data than asked for "
+ "%zu > %zu", len, req->len);
+ lmodified = 1;
+ if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
+ atomicio(vwrite, local_fd, data, len) != len) &&
+ !write_error) {
+ write_errno = errno;
+ write_error = 1;
+ max_req = 0;
+ }
+ else if (!reordered && req->offset <= highwater)
+ highwater = req->offset + len;
+ else if (!reordered && req->offset > highwater)
+ reordered = 1;
+ progress_counter += len;
+ free(data);
+
+ if (len == req->len) {
+ TAILQ_REMOVE(&requests, req, tq);
+ free(req);
+ num_req--;
+ } else {
+ /* Resend the request for the missing data */
+ debug3("Short data block, re-requesting "
+ "%llu -> %llu (%2d)",
+ (unsigned long long)req->offset + len,
+ (unsigned long long)req->offset +
+ req->len - 1, num_req);
+ req->id = conn->msg_id++;
+ req->len -= len;
+ req->offset += len;
+ send_read_request(conn, req->id,
+ req->offset, req->len, handle, handle_len);
+ /* Reduce the request size */
+ if (len < buflen)
+ buflen = MAXIMUM(MIN_READ_SIZE, len);
+ }
+ if (max_req > 0) { /* max_req = 0 iff EOF received */
+ if (size > 0 && offset > size) {
+ /* Only one request at a time
+ * after the expected EOF */
+ debug3("Finish at %llu (%2d)",
+ (unsigned long long)offset,
+ num_req);
+ max_req = 1;
+ } else if (max_req < conn->num_requests) {
+ ++max_req;
+ }
+ }
+ break;
+ default:
+ fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
+ SSH2_FXP_DATA, type);
+ }
+ }
+
+ if (showprogress && size)
+ stop_progress_meter();
+
+ /* Sanity check */
+ if (TAILQ_FIRST(&requests) != NULL)
+ fatal("Transfer complete, but requests still in queue");
+ /* Truncate at highest contiguous point to avoid holes on interrupt */
+ if (read_error || write_error || interrupted) {
+ if (reordered && resume_flag) {
+ error("Unable to resume download of \"%s\": "
+ "server reordered requests", local_path);
+ }
+ debug("truncating at %llu", (unsigned long long)highwater);
+ if (ftruncate(local_fd, highwater) == -1)
+ error("ftruncate \"%s\": %s", local_path,
+ strerror(errno));
+ }
+ if (read_error) {
+ error("Couldn't read from remote file \"%s\" : %s",
+ remote_path, fx2txt(status));
+ status = -1;
+ do_close(conn, handle, handle_len);
+ } else if (write_error) {
+ error("Couldn't write to \"%s\": %s", local_path,
+ strerror(write_errno));
+ status = SSH2_FX_FAILURE;
+ do_close(conn, handle, handle_len);
+ } else {
+ if (do_close(conn, handle, handle_len) != 0 || interrupted)
+ status = SSH2_FX_FAILURE;
+ else
+ status = SSH2_FX_OK;
+ /* Override umask and utimes if asked */
+#ifdef HAVE_FCHMOD
+ if (preserve_flag && fchmod(local_fd, mode) == -1)
+#else
+ if (preserve_flag && chmod(local_path, mode) == -1)
+#endif /* HAVE_FCHMOD */
+ error("Couldn't set mode on \"%s\": %s", local_path,
+ strerror(errno));
+ if (preserve_flag &&
+ (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
+ struct timeval tv[2];
+ tv[0].tv_sec = a->atime;
+ tv[1].tv_sec = a->mtime;
+ tv[0].tv_usec = tv[1].tv_usec = 0;
+ if (utimes(local_path, tv) == -1)
+ error("Can't set times on \"%s\": %s",
+ local_path, strerror(errno));
+ }
+ if (resume_flag && !lmodified)
+ logit("File \"%s\" was not modified", local_path);
+ else if (fsync_flag) {
+ debug("syncing \"%s\"", local_path);
+ if (fsync(local_fd) == -1)
+ error("Couldn't sync file \"%s\": %s",
+ local_path, strerror(errno));
+ }
+ }
+ close(local_fd);
+ sshbuf_free(msg);
+ free(handle);
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+static int
+download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst,
+ int depth, Attrib *dirattrib, int preserve_flag, int print_flag,
+ int resume_flag, int fsync_flag)
+{
+ int i, ret = 0;
+ SFTP_DIRENT **dir_entries;
+ char *filename, *new_src = NULL, *new_dst = NULL;
+ mode_t mode = 0777;
+
+ if (depth >= MAX_DIR_DEPTH) {
+ error("Maximum directory depth exceeded: %d levels", depth);
+ return -1;
+ }
+
+ if (dirattrib == NULL &&
+ (dirattrib = do_stat(conn, src, 1)) == NULL) {
+ error("Unable to stat remote directory \"%s\"", src);
+ return -1;
+ }
+ if (!S_ISDIR(dirattrib->perm)) {
+ error("\"%s\" is not a directory", src);
+ return -1;
+ }
+ if (print_flag)
+ mprintf("Retrieving %s\n", src);
+
+ if (dirattrib->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
+ mode = dirattrib->perm & 01777;
+ else {
+ debug("Server did not send permissions for "
+ "directory \"%s\"", dst);
+ }
+
+ if (mkdir(dst, mode) == -1 && errno != EEXIST) {
+ error("mkdir %s: %s", dst, strerror(errno));
+ return -1;
+ }
+
+ if (do_readdir(conn, src, &dir_entries) == -1) {
+ error("%s: Failed to get directory contents", src);
+ return -1;
+ }
+
+ for (i = 0; dir_entries[i] != NULL && !interrupted; i++) {
+ free(new_dst);
+ free(new_src);
+
+ filename = dir_entries[i]->filename;
+ new_dst = path_append(dst, filename);
+ new_src = path_append(src, filename);
+
+ if (S_ISDIR(dir_entries[i]->a.perm)) {
+ if (strcmp(filename, ".") == 0 ||
+ strcmp(filename, "..") == 0)
+ continue;
+ if (download_dir_internal(conn, new_src, new_dst,
+ depth + 1, &(dir_entries[i]->a), preserve_flag,
+ print_flag, resume_flag, fsync_flag) == -1)
+ ret = -1;
+ } else if (S_ISREG(dir_entries[i]->a.perm) ) {
+ if (do_download(conn, new_src, new_dst,
+ &(dir_entries[i]->a), preserve_flag,
+ resume_flag, fsync_flag) == -1) {
+ error("Download of file %s to %s failed",
+ new_src, new_dst);
+ ret = -1;
+ }
+ } else
+ logit("%s: not a regular file\n", new_src);
+
+ }
+ free(new_dst);
+ free(new_src);
+
+ if (preserve_flag) {
+ if (dirattrib->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+ struct timeval tv[2];
+ tv[0].tv_sec = dirattrib->atime;
+ tv[1].tv_sec = dirattrib->mtime;
+ tv[0].tv_usec = tv[1].tv_usec = 0;
+ if (utimes(dst, tv) == -1)
+ error("Can't set times on \"%s\": %s",
+ dst, strerror(errno));
+ } else
+ debug("Server did not send times for directory "
+ "\"%s\"", dst);
+ }
+
+ free_sftp_dirents(dir_entries);
+
+ return ret;
+}
+
+int
+download_dir(struct sftp_conn *conn, const char *src, const char *dst,
+ Attrib *dirattrib, int preserve_flag, int print_flag, int resume_flag,
+ int fsync_flag)
+{
+ char *src_canon;
+ int ret;
+
+ if ((src_canon = do_realpath(conn, src)) == NULL) {
+ error("Unable to canonicalize path \"%s\"", src);
+ return -1;
+ }
+
+ ret = download_dir_internal(conn, src_canon, dst, 0,
+ dirattrib, preserve_flag, print_flag, resume_flag, fsync_flag);
+ free(src_canon);
+ return ret;
+}
+
+int
+do_upload(struct sftp_conn *conn, const char *local_path,
+ const char *remote_path, int preserve_flag, int resume, int fsync_flag)
+{
+ int r, local_fd;
+ u_int status = SSH2_FX_OK;
+ u_int id;
+ u_char type;
+ off_t offset, progress_counter;
+ u_char *handle, *data;
+ struct sshbuf *msg;
+ struct stat sb;
+ Attrib a, *c = NULL;
+ u_int32_t startid;
+ u_int32_t ackid;
+ struct outstanding_ack {
+ u_int id;
+ u_int len;
+ off_t offset;
+ TAILQ_ENTRY(outstanding_ack) tq;
+ };
+ TAILQ_HEAD(ackhead, outstanding_ack) acks;
+ struct outstanding_ack *ack = NULL;
+ size_t handle_len;
+
+ TAILQ_INIT(&acks);
+
+ if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
+ error("Couldn't open local file \"%s\" for reading: %s",
+ local_path, strerror(errno));
+ return(-1);
+ }
+ if (fstat(local_fd, &sb) == -1) {
+ error("Couldn't fstat local file \"%s\": %s",
+ local_path, strerror(errno));
+ close(local_fd);
+ return(-1);
+ }
+ if (!S_ISREG(sb.st_mode)) {
+ error("%s is not a regular file", local_path);
+ close(local_fd);
+ return(-1);
+ }
+ stat_to_attrib(&sb, &a);
+
+ a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
+ a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
+ a.perm &= 0777;
+ if (!preserve_flag)
+ a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
+
+ if (resume) {
+ /* Get remote file size if it exists */
+ if ((c = do_stat(conn, remote_path, 0)) == NULL) {
+ close(local_fd);
+ return -1;
+ }
+
+ if ((off_t)c->size >= sb.st_size) {
+ error("destination file bigger or same size as "
+ "source file");
+ close(local_fd);
+ return -1;
+ }
+
+ if (lseek(local_fd, (off_t)c->size, SEEK_SET) == -1) {
+ close(local_fd);
+ return -1;
+ }
+ }
+
+ if ((msg = sshbuf_new()) == NULL)
+ fatal("%s: sshbuf_new failed", __func__);
+
+ /* Send open request */
+ id = conn->msg_id++;
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
+ (r = sshbuf_put_u32(msg, id)) != 0 ||
+ (r = sshbuf_put_cstring(msg, remote_path)) != 0 ||
+ (r = sshbuf_put_u32(msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|
+ (resume ? SSH2_FXF_APPEND : SSH2_FXF_TRUNC))) != 0 ||
+ (r = encode_attrib(msg, &a)) != 0)
+ fatal("%s: buffer error: %s", __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
+
+ sshbuf_reset(msg);
+
+ handle = get_handle(conn, id, &handle_len,
+ "remote open(\"%s\")", remote_path);
+ if (handle == NULL) {
+ close(local_fd);
+ sshbuf_free(msg);
+ return -1;
+ }
+
+ startid = ackid = id + 1;
+ data = xmalloc(conn->transfer_buflen);
+
+ /* Read from local and write to remote */
+ offset = progress_counter = (resume ? c->size : 0);
+ if (showprogress)
+ start_progress_meter(local_path, sb.st_size,
+ &progress_counter);
+
+ for (;;) {
+ int len;
+
+ /*
+ * Can't use atomicio here because it returns 0 on EOF,
+ * thus losing the last block of the file.
+ * Simulate an EOF on interrupt, allowing ACKs from the
+ * server to drain.
+ */
+ if (interrupted || status != SSH2_FX_OK)
+ len = 0;
+ else do
+ len = read(local_fd, data, conn->transfer_buflen);
+ while ((len == -1) &&
+ (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
+
+ if (len == -1)
+ fatal("Couldn't read from \"%s\": %s", local_path,
+ strerror(errno));
+
+ if (len != 0) {
+ ack = xcalloc(1, sizeof(*ack));
+ ack->id = ++id;
+ ack->offset = offset;
+ ack->len = len;
+ TAILQ_INSERT_TAIL(&acks, ack, tq);
+
+ sshbuf_reset(msg);
+ if ((r = sshbuf_put_u8(msg, SSH2_FXP_WRITE)) != 0 ||
+ (r = sshbuf_put_u32(msg, ack->id)) != 0 ||
+ (r = sshbuf_put_string(msg, handle,
+ handle_len)) != 0 ||
+ (r = sshbuf_put_u64(msg, offset)) != 0 ||
+ (r = sshbuf_put_string(msg, data, len)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ send_msg(conn, msg);
+ debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
+ id, (unsigned long long)offset, len);
+ } else if (TAILQ_FIRST(&acks) == NULL)
+ break;
+
+ if (ack == NULL)
+ fatal("Unexpected ACK %u", id);
+
+ if (id == startid || len == 0 ||
+ id - ackid >= conn->num_requests) {
+ u_int rid;
+
+ sshbuf_reset(msg);
+ get_msg(conn, msg);
+ if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
+ (r = sshbuf_get_u32(msg, &rid)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+
+ if (type != SSH2_FXP_STATUS)
+ fatal("Expected SSH2_FXP_STATUS(%d) packet, "
+ "got %d", SSH2_FXP_STATUS, type);
+
+ if ((r = sshbuf_get_u32(msg, &status)) != 0)
+ fatal("%s: buffer error: %s",
+ __func__, ssh_err(r));
+ debug3("SSH2_FXP_STATUS %u", status);
+
+ /* Find the request in our queue */
+ for (ack = TAILQ_FIRST(&acks);
+ ack != NULL && ack->id != rid;
+ ack = TAILQ_NEXT(ack, tq))
+ ;
+ if (ack == NULL)
+ fatal("Can't find request for ID %u", rid);
+ TAILQ_REMOVE(&acks, ack, tq);
+ debug3("In write loop, ack for %u %u bytes at %lld",
+ ack->id, ack->len, (long long)ack->offset);
+ ++ackid;
+ progress_counter += ack->len;
+ free(ack);
+ }
+ offset += len;
+ if (offset < 0)
+ fatal("%s: offset < 0", __func__);
+ }
+ sshbuf_free(msg);
+
+ if (showprogress)
+ stop_progress_meter();
+ free(data);
+
+ if (status != SSH2_FX_OK) {
+ error("Couldn't write to remote file \"%s\": %s",
+ remote_path, fx2txt(status));
+ status = SSH2_FX_FAILURE;
+ }
+
+ if (close(local_fd) == -1) {
+ error("Couldn't close local file \"%s\": %s", local_path,
+ strerror(errno));
+ status = SSH2_FX_FAILURE;
+ }
+
+ /* Override umask and utimes if asked */
+ if (preserve_flag)
+ do_fsetstat(conn, handle, handle_len, &a);
+
+ if (fsync_flag)
+ (void)do_fsync(conn, handle, handle_len);
+
+ if (do_close(conn, handle, handle_len) != 0)
+ status = SSH2_FX_FAILURE;
+
+ free(handle);
+
+ return status == SSH2_FX_OK ? 0 : -1;
+}
+
+static int
+upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst,
+ int depth, int preserve_flag, int print_flag, int resume, int fsync_flag)
+{
+ int ret = 0;
+ DIR *dirp;
+ struct dirent *dp;
+ char *filename, *new_src = NULL, *new_dst = NULL;
+ struct stat sb;
+ Attrib a, *dirattrib;
+
+ if (depth >= MAX_DIR_DEPTH) {
+ error("Maximum directory depth exceeded: %d levels", depth);
+ return -1;
+ }
+
+ if (stat(src, &sb) == -1) {
+ error("Couldn't stat directory \"%s\": %s",
+ src, strerror(errno));
+ return -1;
+ }
+ if (!S_ISDIR(sb.st_mode)) {
+ error("\"%s\" is not a directory", src);
+ return -1;
+ }
+ if (print_flag)
+ mprintf("Entering %s\n", src);
+
+ attrib_clear(&a);
+ stat_to_attrib(&sb, &a);
+ a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
+ a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
+ a.perm &= 01777;
+ if (!preserve_flag)
+ a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
+
+ /*
+ * sftp lacks a portable status value to match errno EEXIST,
+ * so if we get a failure back then we must check whether
+ * the path already existed and is a directory.
+ */
+ if (do_mkdir(conn, dst, &a, 0) != 0) {
+ if ((dirattrib = do_stat(conn, dst, 0)) == NULL)
+ return -1;
+ if (!S_ISDIR(dirattrib->perm)) {
+ error("\"%s\" exists but is not a directory", dst);
+ return -1;
+ }
+ }
+
+ if ((dirp = opendir(src)) == NULL) {
+ error("Failed to open dir \"%s\": %s", src, strerror(errno));
+ return -1;
+ }
+
+ while (((dp = readdir(dirp)) != NULL) && !interrupted) {
+ if (dp->d_ino == 0)
+ continue;
+ free(new_dst);
+ free(new_src);
+ filename = dp->d_name;
+ new_dst = path_append(dst, filename);
+ new_src = path_append(src, filename);
+
+ if (lstat(new_src, &sb) == -1) {
+ logit("%s: lstat failed: %s", filename,
+ strerror(errno));
+ ret = -1;
+ } else if (S_ISDIR(sb.st_mode)) {
+ if (strcmp(filename, ".") == 0 ||
+ strcmp(filename, "..") == 0)
+ continue;
+
+ if (upload_dir_internal(conn, new_src, new_dst,
+ depth + 1, preserve_flag, print_flag, resume,
+ fsync_flag) == -1)
+ ret = -1;
+ } else if (S_ISREG(sb.st_mode)) {
+ if (do_upload(conn, new_src, new_dst,
+ preserve_flag, resume, fsync_flag) == -1) {
+ error("Uploading of file %s to %s failed!",
+ new_src, new_dst);
+ ret = -1;
+ }
+ } else
+ logit("%s: not a regular file\n", filename);
+ }
+ free(new_dst);
+ free(new_src);
+
+ do_setstat(conn, dst, &a);
+
+ (void) closedir(dirp);
+ return ret;
+}
+
+int
+upload_dir(struct sftp_conn *conn, const char *src, const char *dst,
+ int preserve_flag, int print_flag, int resume, int fsync_flag)
+{
+ char *dst_canon;
+ int ret;
+
+ if ((dst_canon = do_realpath(conn, dst)) == NULL) {
+ error("Unable to canonicalize path \"%s\"", dst);
+ return -1;
+ }
+
+ ret = upload_dir_internal(conn, src, dst_canon, 0, preserve_flag,
+ print_flag, resume, fsync_flag);
+
+ free(dst_canon);
+ return ret;
+}
+
+char *
+path_append(const char *p1, const char *p2)
+{
+ char *ret;
+ size_t len = strlen(p1) + strlen(p2) + 2;
+
+ ret = xmalloc(len);
+ strlcpy(ret, p1, len);
+ if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/')
+ strlcat(ret, "/", len);
+ strlcat(ret, p2, len);
+
+ return(ret);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 20:33:50 +0000